We all know your prowess in platforming games. Now, it's time for a different challenge. A challenge of the mind. Let's see how you fare in our testing facility -Aperture Science Staff

We here at Aperture have long admired your skills in video gaming. To assist in your goal, we have made the Competitive Testing Initiative. We hope you accept the offer of being our amazing subjects.
Here are some advantages the Competitive Testing Initiative has to offer for you in particular:

-Ability to make inappropriate jokes about Chell at any given time
-The ability to compare intelligence (Although we all know Josh is smarter)
-An interesting storyline that makes for a great Versus
-A talking metal sphere with a British accent

If one feels disoriented during the test, you may use these lifelines:

-Assisted Fratricide: The other player must kill himself. If no source of danger is around, he must type the "kill" command into the dev console.

-Tradition of Testing: The other player must go back to the previous map

-Jammed Portal Device: The other player must turn their keyboard and mouse upside down, similar to Bipolar Controller in the current Versus.

-"Zero"-Point Energy: The other player cannot pick objects up for three minutes.

Each participant gets 3 of these lifelines. Use them wisely.

Aperture Science is not responsible for any incidents that may occur during the test.